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1// RUN: %clang_tsan %darwin_min_target_with_tls_support %s -o %t2// RUN: %clang_tsan %darwin_min_target_with_tls_support %s -DBUILD_SO -fPIC -o \3// RUN: %t-so.so -shared4// RUN: %run %t 2>&1 | FileCheck %s5// XFAIL: target={{.*netbsd.*}}6 7// Test that tsan cleans up dynamic TLS memory between reuse.8 9#include "test.h"10 11#ifndef BUILD_SO12#include <assert.h>13#include <dlfcn.h>14 15typedef volatile long *(* get_t)();16get_t GetTls;17 18void *Thread1(void *arg) {19 pthread_detach(pthread_self());20 volatile long *x = GetTls();21 *x = 42;22 fprintf(stderr, "stack: %p dtls: %p\n", &x, x);23 barrier_wait(&barrier);24 return 0;25}26 27void *Thread2(void *arg) {28 volatile long *x = GetTls();29 *x = 42;30 fprintf(stderr, "stack: %p dtls: %p\n", &x, x);31 return 0;32}33 34int main(int argc, char *argv[]) {35 char path[4096];36 snprintf(path, sizeof(path), "%s-so.so", argv[0]);37 38 void *handle = dlopen(path, RTLD_LAZY);39 if (!handle) fprintf(stderr, "%s\n", dlerror());40 assert(handle != 0);41 GetTls = (get_t)dlsym(handle, "GetTls");42 assert(dlerror() == 0);43 44 barrier_init(&barrier, 2);45 pthread_t t[2];46 pthread_create(&t[0], 0, Thread1, 0);47 barrier_wait(&barrier);48 // Wait for actual thread termination without using pthread_join,49 // which would synchronize threads.50 sleep(1);51 pthread_create(&t[1], 0, Thread2, 0);52 pthread_join(t[1], 0);53 fprintf(stderr, "DONE\n");54 return 0;55}56#else // BUILD_SO57__thread long huge_thread_local_array[1 << 17];58long *GetTls() {59 return &huge_thread_local_array[0];60}61#endif62 63// CHECK-NOT: ThreadSanitizer: data race64// CHECK: DONE65